Original scientific paper

Industrial control measurements of high chromium steel rolls heat treatment

B. Karpe ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
S. Novak ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
A. Nagode ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
S. Kožuh ; Faculty of Metallurgy, University of Zagreb, Sisak, Croatia
A. Pavlič ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
S. Rečnik ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
B. Kosec ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia

Abstract

In this paper, industrial control measurements of the heat treatment of high chromium steel (HCS) rolls is presented. Measurements of the gas fired car bottom chamber furnace Bosio PP-KP 70/1150 were carried out in the company Valji d. o. o., Štore, Slovenia. Temperature in the individual heating zones of the furnace, temperatures of the roll surface, furnace external walls, and gas consumption was monitored throughout the whole process of heat treatment. The temperature profile of the rolls cross-section was calculated using computer simulation. Periodical measurements of CO and NO_x emissions were also carried out with the aim of combustion evaluation and ecological integrity. The successfulness of heat treatment was examined through microstructure observation, hardness measurement, and the amount of retained austenite in the heat treated rolls.

Keywords

high chromium steel (HCS) rolls; heat treatment; microstructure; industrial measurements; control

Hrčak ID:

201741

URI

https://hrcak.srce.hr/201741

Publication date:

1.10.2018.

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